Typo fixes in comments and minor code cleanups.

* Fix some typos in Javadoc and log messages.
* Remove redundant initializer in BluetoothAdapter.readOutOfBandData()
* Use canonical "UTF-8" charset name instead of "UTF8" in
    BluetoothDevice.convertPinToBytes()

Change-Id: I58cd5dc48a7ad0053d204c5f590b4b3d438d8672
17 files changed